A dramatic chase by sea and air ended with the arrest of 4 drug smugglers and over a ton of hashish seized by Spanish authorities.

Spain's Civil Guard has released video of an anti-drug operation off the coast of Cadiz, southern Spain, involving two Civil Guard marine vessels and a Civil Guard helicopter.

After a protracted chase into the bay of Cadiz, the Civil Guard were able to intercept the 14 metre long speed boat which carried 1700 kilos of hashish. The speed boat was using 4 outboard motors of 350 cylinders each.

During the chase, two other speed boats piloted by members of the smuggling gang tried to interfere and impede the Civil Guard action.

The authorities were tipped off that the drug drop was about to take place near Chipiona, Cadiz.